Probability that a sum of 2 numbers is less than 6

Hi.

Here it is:

What is the probability that given two different spinners with the numbers 0-7 on one and the numbers 0-9 on the other, that the sum of the result of spinning both is less than six or the value of the first spinner is less than 3.

I don't know where to start, but I've graphed the inequality x+y<6, and I think that the number of possibilities for the sum is 18?